Topic: 31 MTs with stock gearing

[jcsanders79]

Just realized that TOURCH didn't even start this thread just started spouting crap and wants it on topic

[chrisfranklin]

To accommodate the 31MTs, I was looking at trimming the fenders and adding a one inch shackle lift, no big deal.  
I'll probably use TJ flares or something close to them.

The shackles are a question though.  Plenty of 1 inch kits out there -- w/poly bushings, without bushings, with metal brackets, boomerang, different grade bolt hardware.   I've had good luck with poly bushings in the past, at least on sway bars.  But I don't want to maybe stiffen up this YJ's suspension too much running shackles with those metal reenforcement brackets.   What should I do,  just buy a 1 inch setup with poly bushings and refrain from adding the included metal reenforcements?    Also are boomerangs worth the coin?  

[chrisfranklin]

Actually i took a second and did a search here and shackles have certainly been discussed in the past.   It looks like  1 inch boomerangs are good for the rear and then just do regular 1 inch shackles for the front.  And don't add the brace if you want a little more flexibility. 

[jagular7]

A rough ride from leaf springs come from the friction from the movement on the springs as well as the freedom of the movement of the springs. Freedom of movement relates to the shocks as well as the capability of the shackle to swing. Shocks have to be valved correctly to minimize the oscillation of the movement of the axle. The shackle lengthens and shortens the leaf so that it can move with the axle. By tightening the bolts which hold the shackle to the leaf as well as the frame mount too much will give restriction to the swing movement. Friction on the leaves themselves can provide a rough ride. The ends of the leafs are now usually tapered to provide less friction contact area between them. They also usually have a plastic or rub-type isolator as well on the end to minimize the contact friction. As the springs flatten or convex, the end of the spring rubs the spring above it. This friction translate back to the ride. Also, many leaf springs will have a clamp around them to secure the leafs together. If this is tight, the leaves don't have a way to separate from each other and the full contact surface provides friction and gives a rough ride. Each leaf has a different natural bend to them. This gives them the progressive spring rate. The locations where the springs contact each other is at the ends of the leafs and in the middle where the center pin is located. Anything beyond that will give a rough ride.

[Torch_Ind]

Just realized that TOURCH didn't even start this thread just started spouting crap and wants it on topic

just trying to help sorry your afended by my knoledge google stuff doesn't always tell you the truth ask dana what they say it won't say 35's for the d30

you can do what ya want... have fun with your ducks

[aw12345]

You can always run a set of Rockwells and 31"s if you are afraid if you might possibly break something

[stan98tj]

why are we concerned about 31s and stock gearing? i still run 31s and stock gearing and havent had a problem yet. id like to upgrade to 32s but dont have the $$ right now-my 31s fit my 2.5" lift just fine and it all works well as a package altogether. Plus u can fit 31s on a tj and not have to adjust or lift the vehicle

[jeeper78]

 Would 32's be ok with the stock gearing on a 2.5l TJ on the roadway until enough cash is gotten for a regear?

[Jeffy]

Would 32's be ok with the stock gearing on a 2.5l TJ on the roadway until enough cash is gotten for a regear?

They will work OK.  I drove that way for several years till I finally got enough parts to do a gear swap.  Personally, I think I'd rather have gone with 33x10.5R15's as they have less rolling and wind resistance and fit better on a stock wheel.

[stan98tj]

wouldnt u need at least a body lift to fit the 32s?

[Jeffy]

wouldnt u need at least a body lift to fit the 32s?

And wheels with more offset...

[jeeper78]

They will work OK.  I drove that way for several years till I finally got enough parts to do a gear swap.  Personally, I think I'd rather have gone with 33x10.5R15's as they have less rolling and wind resistance and fit better on a stock wheel.

I would have thought the problem with the 33x10.5's with stock gears would be the amount of power/gearing to turn those from a standing start. 32's being only 1 inch taller and 33's being twice that.

[Jeffy]

I would have thought the problem with the 33x10.5's with stock gears would be the amount of power/gearing to turn those from a standing start. 32's being only 1 inch taller and 33's being twice that.

Like I said, the 33's will have less rolling resistance, since they are an inch thinner then the 32's.

[jeeper78]

Like I said, the 33's will have less rolling resistance, since they are an inch thinner then the 32's.

gotcha

[Torch_Ind]

gotcha

I re-geared to 4.88's when i went to 33x12.5's was much better..